Identify the neutralization reaction.
a) 2H 3PO 4 + 3Ba(OH) 2 ⟶ 6H 2O + Ba(PO 4) 2
b) 2 NO 2 ⟶ 2 O 2 + N 2 PO 4
c)2NH 3 + H 2SO 4 ⟶ (NH 4) 2SO 4
d) 3Pb + 2H 3PO 4 ⟶ 3H 2 + Pb 3(PO 4) 2

3Ba(OH)₂ + 2H₃PO₄    →  Ba₃(PO₄)₂ + 6H₂O

Explanation:

Neutralization reaction:

When an acid and base react they form water and salt.The reaction is called neutralization reaction.

General equation:

HX + BOH    →    BX   +  H₂O

From given reaction equations only option C is correct because only this reaction gives salt and water.

Chemical equation:

3Ba(OH)₂ + 2H₃PO₄    →  Ba₃(PO₄)₂ + 6H₂O

Barium hydroxide is acting as a base. H₃PO₄ is an acid. Both these reactants react to form salt which is barium phosphate and water.

Other options are incorrect because non of these reaction produced salt and water. So option A is correct.

it means there are 3 atoms of oxygen